refactor: use healthcheck for db, remove psql client from image (#737)

* refactor: use healthcheck for db, remove postgresql client from main image

* fix: redis dependency condition

* cleanup entrypoint.sh

* fix healthcheck command

docker/entrypoint.sh

@@ -2,13 +2,6 @@
 
 set -e
 
-export PGPASSWORD="$POSTGRES_PASSWORD"
-
-until psql -h "$POSTGRES_HOST" -U "$POSTGRES_USERNAME" -d "$POSTGRES_DATABASE" -c '\q'; do
-  >&2 echo "Waiting for Postgres to be ready..."
-  sleep 1
-done
-
 if [ ! -f /automatisch/storage/.env ]; then
   >&2 echo "Saving environment variables"
   ENCRYPTION_KEY="${ENCRYPTION_KEY:-$(openssl rand -base64 36)}"
@@ -17,8 +10,6 @@ if [ ! -f /automatisch/storage/.env ]; then
   echo "APP_SECRET_KEY=$APP_SECRET_KEY" >> /automatisch/storage/.env
 fi
 
->&2 echo "Postgres is up - executing command"
-
 if [ -n "$WORKER" ]; then
   automatisch start-worker --env-file /automatisch/storage/.env
 else