Add Dockerfile and remove old service and pm2 configs

Author: rtm516

Dockerfile

@@ -0,0 +1,14 @@
+FROM eclipse-temurin:17-alpine
+
+RUN apk update \
+	&& apk add tesseract-ocr \
+	&& adduser -h /opt/app -H app
+
+RUN mkdir -p /opt/app && \
+    chown app:app /opt/app
+
+USER app:app
+
+WORKDIR /opt/app
+
+CMD ["java", "-jar", "GeyserBot.jar"]