refactor(docker-compose): incorporate standalone build

docker/Dockerfile.compose

@@ -0,0 +1,11 @@
+# syntax=docker/dockerfile:1
+FROM automatischio/automatisch:0.2.0
+WORKDIR /automatisch
+
+RUN apk add --no-cache openssl dos2unix
+
+COPY ./compose-entrypoint.sh /compose-entrypoint.sh
+RUN dos2unix /compose-entrypoint.sh
+
+EXPOSE 3000
+ENTRYPOINT ["sh", "/compose-entrypoint.sh"]

docker/compose-entrypoint.sh

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+#!/bin/sh
+
+set -e
+
+if [ ! -f /automatisch/storage/.env ]; then
+  >&2 echo "Saving environment variables"
+  ENCRYPTION_KEY="${ENCRYPTION_KEY:-$(openssl rand -base64 36)}"
+  APP_SECRET_KEY="${APP_SECRET_KEY:-$(openssl rand -base64 36)}"
+  echo "ENCRYPTION_KEY=$ENCRYPTION_KEY" >> /automatisch/storage/.env
+  echo "APP_SECRET_KEY=$APP_SECRET_KEY" >> /automatisch/storage/.env
+fi
+
+# initiate env. vars. from /automatisch/storage/.env file
+export $(grep -v '^#' /automatisch/storage/.env | xargs)
+
+echo "Environment variables have been set!"
+
+sh /entrypoint.sh