Added dockerfile and compose

Dockerfile

@@ -0,0 +1,15 @@
+FROM node:20
+# Create app directory
+WORKDIR /usr/src/app
+# Install app dependencies
+# A wildcard is used to ensure both package.json AND package-lock.json are copied
+# where available (npm@5+)
+COPY package*.json ./
+RUN npm install
+RUN npm install -g nodemon
+# If you are building your code for production
+# RUN npm ci --omit=dev
+# Bundle app source
+COPY . .
+EXPOSE 3000
+CMD [ "node", "app.js" ]

docker-compose.yaml

@@ -0,0 +1,7 @@
+version: "3.3"
+services:
+  cs2rcon:
+    build:
+      context: .
+    ports:
+      - "3000:3000"