⬆️ Upgrade docker development environment

Upgraded to Elixir 1.16 and Erlang 26, using alpine containers this time
to make things more efficient.

Author: danielberkompas

Dockerfile

@@ -1,11 +1,10 @@
-FROM hexpm/elixir:1.13.4-erlang-25.0-ubuntu-focal-20211006
+FROM hexpm/elixir:1.16.2-erlang-26.1.2-alpine-3.16.9
 
-# Install debian packages
-RUN apt-get update
-RUN apt-get install --yes build-essential inotify-tools postgresql-client
-RUN apt-get install --yes git
+RUN apk --update add postgresql-client
+RUN apk add git
+RUN apk add bash
 
 RUN mix local.hex --force
 RUN mix local.rebar --force
 
-WORKDIR /app
+WORKDIR /app

docker-compose.yml

@@ -1,7 +1,7 @@
 version: "3.2"
 services:
   db:
-    image: postgres
+    image: postgres:alpine
     environment:
       - POSTGRES_HOST_AUTH_METHOD=trust
   code: