fix docker go version

.github/workflows/monitoring.yml

@@ -0,0 +1,22 @@
+name: "Compile SOM"
+
+on:
+  push:
+    branches:
+      - develop
+    paths:
+      - monitoring/**
+      - relayer/**
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
+
+      - name: Setup Docker Buildx
+        uses: docker/setup-buildx-action@d70bba72b1f3fd22344832f00baa16ece964efeb # v3.3.0
+
+      - name: Docker Buildx Build
+        run: docker buildx build --file ops/monitoring/Dockerfile ./

ops/monitoring/Dockerfile

@@ -1,6 +1,6 @@
 # Build image
 
-FROM ubuntu:20.04 AS build
+FROM golang:1.21.5 AS build
 
 # OS dependencies
 RUN apt-get update && apt-get install -y wget gcc
@@ -13,13 +13,6 @@ COPY ./pkg /solana-monitoring/pkg
 COPY ./go.mod /solana-monitoring/
 COPY ./go.sum /solana-monitoring/
 
-# Install golang
-
-RUN wget -c https://dl.google.com/go/go1.18.1.linux-amd64.tar.gz -O - \
-  | tar -xz -C /usr/local \
-  && mkdir -p /go/src /go/bin
-ENV PATH /usr/local/go/bin:$PATH
-
 # Compile binary
 
 WORKDIR /solana-monitoring