Add Spring Boot Twitch overlay server with CI and Docker

Makefile

@@ -0,0 +1,23 @@
+APP_NAME=imgfloat
+
+.PHONY: run test package docker-build docker-run ssl
+
+run:
+mvn spring-boot:run
+
+test:
+mvn test
+
+package:
+mvn clean package
+
+docker-build:
+docker build -t $(APP_NAME):latest .
+
+docker-run:
+docker run --rm -p 8080:8080 -e TWITCH_CLIENT_ID=$${TWITCH_CLIENT_ID} -e TWITCH_CLIENT_SECRET=$${TWITCH_CLIENT_SECRET} $(APP_NAME):latest
+
+ssl:
+mkdir -p local
+keytool -genkeypair -alias $(APP_NAME) -keyalg RSA -keystore local/keystore.p12 -storetype PKCS12 -storepass changeit -keypass changeit -dname "CN=localhost" -validity 365
+echo "Use SSL_ENABLED=true SSL_KEYSTORE_PATH=file:$$PWD/local/keystore.p12"