diff --git a/docker-compose.local.yml b/docker-compose.local.yml
index 943b07f57..c70cf9e60 100644
--- a/docker-compose.local.yml
+++ b/docker-compose.local.yml
@@ -114,14 +114,13 @@ services:
       - db
       - --port
       - "5432"
-      - data.pbf
-      - --hstore
-      - --hstore-add-index
-      - --hstore-column
-      - raw
-    working_dir: /data
+      - /map/data/data.pbf
+      - --output=flex
+      - --style
+      - /map/osm2pgsql/style.lua
     volumes:
-      - ./map/data/:/data/:ro
+      - ./map/data/:/map/data/:ro
+      - ./map/osm2pgsql/:/map/osm2pgsql/:ro
     depends_on:
       osm-download-data:
         condition: service_completed_successfully
@@ -148,6 +147,8 @@ services:
         condition: service_completed_successfully
       db:
         condition: service_healthy
+    volumes:
+      - ./map/osm2pgsql/:/map/osm2pgsql/:ro
   osm2pgsql-replication:
     image: iboates/osm2pgsql:latest
     environment:
@@ -167,6 +168,8 @@ services:
     depends_on:
       osm2pgsql-replication-init:
         condition: service_completed_successfully
+    volumes:
+      - ./map/osm2pgsql/:/map/osm2pgsql/:ro
   martin-init-config:
     image: alpine:latest
     command:
diff --git a/docker-compose.yml b/docker-compose.yml
index 0b9e7a0a0..dc22f53d1 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -211,7 +211,7 @@ services:
       - --create
       - --slim
       - --cache
-      - "4096" # cache size in MB, maybe underspeced
+      - "4096" # cache size in MB, maybe too low for optimum
       - --database
       - ${POSTGRES_DB}
       - --user
@@ -220,14 +220,13 @@ services:
       - db
       - --port
       - "5432"
-      - data.pbf
-      - --hstore
-      - --hstore-add-index
-      - --hstore-column
-      - raw
-    working_dir: /data
+      - /map/data/data.pbf
+      - --output=flex
+      - --style
+      - /map/osm2pgsql/style.lua
     volumes:
-      - ./map/data/:/data/:ro
+      - ./map/data/:/map/data/:ro
+      - ./map/osm2pgsql/:/map/osm2pgsql/:ro
     depends_on:
       osm-download-data:
         condition: service_completed_successfully
@@ -256,6 +255,8 @@ services:
         condition: service_completed_successfully
       db:
         condition: service_healthy
+    volumes:
+      - ./map/osm2pgsql/:/map/osm2pgsql/:ro
   osm2pgsql-replication:
     image: iboates/osm2pgsql:latest
     networks:
@@ -277,6 +278,8 @@ services:
     depends_on:
       osm2pgsql-replication-init:
         condition: service_completed_successfully
+    volumes:
+      - ./map/osm2pgsql/:/map/osm2pgsql/:ro
   martin-init-config:
     image: alpine:latest
     command:
diff --git a/map/osm2pgsql/style.lua b/map/osm2pgsql/style.lua
new file mode 100644
index 000000000..4654b6399
--- /dev/null
+++ b/map/osm2pgsql/style.lua
@@ -0,0 +1,160 @@
+-- This config exmple file is released into the Public Domain.
+
+-- This is a very simple Lua config for the Flex output not intended for
+-- real-world use. Use it do understand the basic principles of the
+-- configuration. After reading and understanding this, have a look at
+-- "geometries.lua".
+
+-- For debugging
+-- inspect = require('inspect')
+
+-- The global variable "osm2pgsql" is used to talk to the main osm2pgsql code.
+-- You can, for instance, get the version of osm2pgsql:
+print('osm2pgsql version: ' .. osm2pgsql.version)
+
+-- A place to store the SQL tables we will define shortly.
+local tables = {}
+
+-- Create a new table called "pois" with the given columns. When running in
+-- "create" mode, this will do the `CREATE TABLE`, when running in "append"
+-- mode, this will only declare the table for use.
+--
+-- This is a "node table", it can only contain data derived from nodes and will
+-- contain a "node_id" column (SQL type INT8) as first column. When running in
+-- "append" mode, osm2pgsql will automatically update this table using the node
+-- ids.
+tables.pois = osm2pgsql.define_node_table('pois', {
+    { column = 'tags', type = 'jsonb' },
+    { column = 'geom', type = 'point', not_null = true }, -- will be something like `GEOMETRY(Point, 4326)` in SQL
+})
+
+-- A special table for restaurants to demonstrate that we can have any tables
+-- with any columns we want.
+tables.restaurants = osm2pgsql.define_node_table('restaurants', {
+    { column = 'name',    type = 'text' },
+    { column = 'cuisine', type = 'text' },
+    -- We declare all geometry columns as "NOT NULL". If osm2pgsql encounters
+    -- an invalid geometry (for whatever reason) it will generate a null
+    -- geometry which will not be written to the database if "not_null" is
+    -- set. The result is that broken geometries will just be silently
+    -- ignored.
+    { column = 'geom',    type = 'point', not_null = true },
+})
+
+-- This is a "way table", it can only contain data derived from ways and will
+-- contain a "way_id" column. When running in "append" mode, osm2pgsql will
+-- automatically update this table using the way ids.
+tables.ways = osm2pgsql.define_way_table('ways', {
+    { column = 'tags', type = 'jsonb' },
+    { column = 'geom', type = 'linestring', not_null = true },
+})
+
+-- This is an "area table", it can contain data derived from ways or relations
+-- and will contain an "area_id" column. Way ids will be stored "as is" in the
+-- "area_id" column, for relations the negative id will be stored. When
+-- running in "append" mode, osm2pgsql will automatically update this table
+-- using the way/relation ids.
+tables.polygons = osm2pgsql.define_area_table('polygons', {
+    { column = 'type', type = 'text' },
+    { column = 'tags', type = 'jsonb' },
+    -- The type of the `geom` column is `geometry`, because we need to store
+    -- polygons AND multipolygons
+    { column = 'geom', type = 'geometry', not_null = true },
+})
+
+-- Debug output: Show definition of tables
+for name, dtable in pairs(tables) do
+    print("\ntable '" .. name .. "':")
+    print("  name='" .. dtable:name() .. "'")
+--    print("  columns=" .. inspect(dtable:columns()))
+end
+
+-- Helper function to remove some of the tags we usually are not interested in.
+-- Returns true if there are no tags left.
+local function clean_tags(tags)
+    tags.odbl = nil
+    tags.created_by = nil
+    tags.source = nil
+    tags['source:ref'] = nil
+
+    return next(tags) == nil
+end
+
+-- Called for every node in the input. The `object` argument contains all the
+-- attributes of the node like `id`, `version`, etc. as well as all tags as a
+-- Lua table (`object.tags`).
+function osm2pgsql.process_node(object)
+    --  Uncomment next line to look at the object data:
+    --  print(inspect(object))
+
+    if clean_tags(object.tags) then
+        return
+    end
+
+    if object.tags.amenity == 'restaurant' then
+        -- Add a row to the SQL table. The keys in the parameter table
+        -- correspond to the table columns, if one is missing the column will
+        -- be NULL. Id and geometry columns will be filled automatically.
+        tables.restaurants:insert({
+            name = object.tags.name,
+            cuisine = object.tags.cuisine,
+            geom = object:as_point()
+        })
+    else
+        tables.pois:insert({
+            -- We know `tags` is of type `jsonb` so this will do the
+            -- right thing.
+            tags = object.tags,
+            geom = object:as_point()
+        })
+    end
+end
+
+-- Called for every way in the input. The `object` argument contains the same
+-- information as with nodes and additionally a boolean `is_closed` flag and
+-- the list of node IDs referenced by the way (`object.nodes`).
+function osm2pgsql.process_way(object)
+    --  Uncomment next line to look at the object data:
+    --  print(inspect(object))
+
+    if clean_tags(object.tags) then
+        return
+    end
+
+    -- Very simple check to decide whether a way is a polygon or not, in a
+    -- real stylesheet we'd have to also look at the tags...
+    if object.is_closed then
+        tables.polygons:insert({
+            type = object.type,
+            tags = object.tags,
+            geom = object:as_polygon()
+        })
+    else
+        tables.ways:insert({
+            tags = object.tags,
+            geom = object:as_linestring()
+        })
+    end
+end
+
+-- Called for every relation in the input. The `object` argument contains the
+-- same information as with nodes and additionally an array of members
+-- (`object.members`).
+function osm2pgsql.process_relation(object)
+    --  Uncomment next line to look at the object data:
+    --  print(inspect(object))
+
+    if clean_tags(object.tags) then
+        return
+    end
+
+    -- Store multipolygons and boundaries as polygons
+    if object.tags.type == 'multipolygon' or
+       object.tags.type == 'boundary' then
+         tables.polygons:insert({
+            type = object.type,
+            tags = object.tags,
+            geom = object:as_multipolygon()
+        })
+    end
+end