Add docker deployments with caprover

Signed-off-by: William Brawner <me@wbrawner.com>

Dockerfile

@@ -0,0 +1,12 @@
+FROM openjdk:14-jdk as builder
+MAINTAINER William Brawner <me@wbrawner.com>
+
+RUN mkdir -p /home/gradle
+COPY . /home/gradle/src
+WORKDIR /home/gradle/src
+RUN /home/gradle/src/gradlew --console=plain --no-daemon server:bootJar
+
+FROM openjdk:14-jdk-slim
+EXPOSE 8080
+COPY --from=builder /home/gradle/src/server/build/libs/flayre-server.jar flayre-server.jar
+CMD /usr/local/openjdk-14/bin/java $JVM_ARGS -jar /flayre-server.jar

captain-definition

@@ -0,0 +1,4 @@
+ {
+  "schemaVersion": 2,
+  "dockerfilePath": "./Dockerfile"
+ }

server/build.gradle

@@ -10,6 +10,10 @@ repositories {
     mavenCentral()
 }
 
+bootJar {
+    archiveFileName = "flayre-server.${archiveExtension.get()}"
+}
+
 dependencies {
     implementation project(':shared')
     implementation 'org.springframework.boot:spring-boot-starter-data-jdbc'