Docker support #6

Part of PR feedback addressed

Dockerfile.dev

@@ -1,12 +1,25 @@
-FROM gradle:4.1-jdk8
+FROM gradle:4.1-jdk8-alpine
 
-ENV HOME /home/gradle
+# Gradle image creates a 'gradle' user, so fallback to 'root' to do initial setup
+USER root
 
-RUN mkdir -p $HOME/app \
-    && cd $HOME/app
-WORKDIR $HOME/app
+RUN mkdir -p /opt/app \
+    && mkdir -p /opt/.gradle \
+    && addgroup -S -g 1001 boot \
+	&& adduser -D -S -G boot -u 1001 -s /bin/ash boot \
+    && chown -R boot:boot /opt/app \
+    && chown -R boot:boot /opt/.gradle
+
+WORKDIR /opt/app
 
 COPY .env .
 COPY settings.gradle .
 
-CMD ["gradle", "bootRun"]
+# Run the build on behalf of non-root 'boot' user
+USER boot
+
+# Release gradle caches if any
+RUN find /opt/.gradle -type f -name "*.lock" | while read f; do rm $f; done
+
+# Using gradle home where 'boot' user has full access to
+ENTRYPOINT ["gradle", "-g", "/opt/.gradle"]

docker-compose.test.yml

@@ -1,9 +1,10 @@
 version: "3"
 services:
   spring-boot-graphql-template-test:
+    command: clean test
     build:
       context: .
-      dockerfile: Dockerfile.test
+      dockerfile: Dockerfile.dev
     volumes:
-      - $HOME/.gradle/caches:/home/gradle/.gradle/caches
-      - ${PWD}/api:/home/gradle/app/api
+      - $HOME/.gradle/caches:/opt/.gradle/caches
+      - ${PWD}/api:/opt/app/api

docker-compose.yml

@@ -1,12 +1,13 @@
 version: "3"
 services:
   spring-boot-graphql-template:
+    command: bootRun
     build:
       context: .
       dockerfile: Dockerfile.dev
     volumes:
-      - $HOME/.gradle/caches:/home/gradle/.gradle/caches
-      - ${PWD}/api:/home/gradle/app/api
+      - $HOME/.gradle/caches:/opt/.gradle/caches
+      - ${PWD}/api:/opt/app/api
     ports:
       - "8080:8080"
       - "5005:5005"