docker: use platform-specific dockerize build - fixes #43

Dockerfile

@@ -43,8 +43,15 @@ RUN FRONTEND_BUILD_DIR=/frontend /venv/*/bin/python ./manage.py add_version ${BU
 
 FROM python:3.7-alpine AS backend
 
-ADD https://github.com/ufoscout/docker-compose-wait/releases/download/2.9.0/wait /wait
-RUN chmod +x /wait
+ENV DOCKERIZE_VERSION v0.6.1
+ARG TARGETPLATFORM
+RUN if [ "$TARGETPLATFORM" = "arm64" ]; \
+    then export DOCKERIZE_ARCH=armhf; \
+    else export DOCKERIZE_ARCH=amd64; \
+    fi
+RUN wget https://github.com/jwilder/dockerize/releases/download/$DOCKERIZE_VERSION/dockerize-linux-$DOCKERIZE_ARCH-$DOCKERIZE_VERSION.tar.gz \
+    && tar -C /usr/local/bin -xzvf dockerize-linux-$DOCKERIZE_ARCH-$DOCKERIZE_VERSION.tar.gz \
+    && rm dockerize-linux-$DOCKERIZE_ARCH-$DOCKERIZE_VERSION.tar.gz
 
 RUN apk add mariadb-connector-c
 

backend/start.sh

@@ -1,5 +1,7 @@
 #!/bin/sh
-/wait
+if [ -z "$var" ]; then
+    dockerize $DOCKERIZE_ARGS
+fi
 cd /app
 /venv/*/bin/python ./manage.py migrate
 /venv/*/bin/gunicorn

docker-compose.yml

@@ -14,7 +14,7 @@ services:
         - ENABLE_HOMEPAGE=False
         - DEBUG=False
         - APP_DIST_STORAGE=file:///app-dist
-        - WAIT_HOSTS=db:3306
+        - DOCKERIZE_ARGS="-wait tcp://db:3306 -timeout 60s"
 
     db:
         image: mariadb:10.7.1