Added initial deployment instructions. (#3)

Co-authored-by: Emmanuel Mathot <[email protected]>

.gitignore

@@ -1,3 +1,4 @@
 .idea
+helm/Chart.lock
 .DS_STORE
-.DS_Store
+.DS_Store

README.md

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 # polder
 Web AOI viewer
 
+## Installation
+
+This application needs a kubernetes cluster. Once you have one set up you can `helm install` with the following steps:
+
+0. `eoapi-k8s` depends on the [Crunchydata Postgresql Operator](https://access.crunchydata.com/documentation/postgres-operator/latest/installation/helm). Install that first:
+
+   ```bash
+   helm install --set disable_check_for_upgrades=true pgo oci://registry.developers.crunchydata.com/crunchydata/pgo --version 5.5.2
+   ```
+
+1. Add the eoapi repo from https://devseed.com/eoapi-k8s/:
+
+  ```bash
+  helm repo add eoapi https://devseed.com/eoapi-k8s/
+  ```
+
+2. Include dependencies
+
+    ```bash
+    helm dependency build
+    ```
+
+2. Then go to the `helm` directory and do `helm install`
+
+   ```bash
+   cd helm && helm install -n polder --create-namespace polder .
+   ```

helm/Chart.yaml

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+apiVersion: v2
+name: polder
+description: Create a polder - Web AOI viewer - instance.
+type: application
+kubeVersion: ">=1.23.0-0"
+
+# This is the chart version. This version number should be incremented each time you make changes
+# to the chart and its templates, including the app version.
+# Versions are expected to follow Semantic Versioning (https://semver.org/)
+version: "0.0.1"
+
+# This is the version number of the application being deployed. This version number should be
+# incremented each time you make changes to the application. Versions are not expected to
+# follow Semantic Versioning. They should reflect the version the application is using.
+# It is recommended to use it with quotes.
+appVersion: "0.0.1"
+
+dependencies:
+  - name: eoapi
+    version: 0.4.17
+    repository: "https://devseed.com/eoapi-k8s/"

helm/templates/Webapp.yml

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+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: {{ .Values.service.name }}
+  labels:
+    app: {{ .Values.service.name }}
+spec:
+  replicas: {{ .Values.replicaCount }}
+  selector:
+    matchLabels:
+      app: {{ .Values.service.name }}
+  template:
+    metadata:
+      labels:
+        app: {{ .Values.service.name }}
+    spec:
+      containers:
+        - name: nginx
+          image: "{{ .Values.image.repository }}:{{ .Values.image.tag }}"
+          ports:
+            - containerPort: 80
+          resources:
+            {{- toYaml .Values.resources | nindent 12 }}
+
+---
+
+apiVersion: v1
+kind: Service
+metadata:
+  name: {{ .Values.service.name }}
+  labels:
+    app: {{ .Values.service.name }}
+spec:
+  type: {{ .Values.service.type }}
+  ports:
+    - port: 8081
+      targetPort: 80
+  selector:
+    app: {{ .Values.service.name }}

helm/values.yaml

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+replicaCount: 1
+
+image:
+  repository: nginx
+  pullPolicy: IfNotPresent
+  tag: "1.27.2"
+
+service:
+  enabled: true
+  name: polder-webapp
+  type: NodePort
+  ports:
+    - port: 8081
+      targetPort: 80
+      nodePort: 30001
+  selector:
+    app: polder-webapp
+
+resources: {}