Rename dockerfile to Dockerfile for podman build compatibility

Dockerfile

@@ -0,0 +1,15 @@
+FROM node:latest AS build
+
+WORKDIR /app
+COPY package.json /
+COPY package-lock.json /
+COPY .npmrc /
+RUN npm install
+COPY . ./
+RUN npm run build
+
+FROM georgjung/nginx-brotli:mainline-alpine
+RUN rm -f /etc/nginx/nginx.conf
+COPY ./nginx.conf /etc/nginx/nginx.conf
+COPY --from=build /app/build /usr/share/nginx/html
+RUN chown -R nginx:nginx /usr/share/nginx/html