add Dockerfile and nginx.conf

Dockerfile

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+FROM node:14.1.0-alpine as build-deps
+
+
+#Stage 1
+
+WORKDIR /usr/src/app
+COPY package.json yarn.lock ./
+RUN yarn
+COPY . ./
+ENV NODE_ENV=production
+RUN yarn build
+
+#Stage 2
+
+FROM nginx:1.17.5-alpine
+COPY --from=build-deps /usr/src/app/build /var/www
+COPY nginx.conf /etc/nginx/nginx.conf
+EXPOSE 80
+CMD ["nginx", "-g", "daemon off;"]

nginx.conf

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+# auto detects a good number of processes to run
+worker_processes auto;
+
+#Provides the configuration file context in which the directives that affect connection processing are specified.
+events {
+    # Sets the maximum number of simultaneous connections that can be opened by a worker process.
+    worker_connections 8000;
+    # Tells the worker to accept multiple connections at a time
+    multi_accept on;
+}
+
+
+http {
+    # what times to include
+    include       /etc/nginx/mime.types;
+    # what is the default one
+    default_type  application/octet-stream;
+
+    # Sets the path, format, and configuration for a buffered log write
+    log_format compression '$remote_addr - $remote_user [$time_local] '
+        '"$request" $status $upstream_addr '
+        '"$http_referer" "$http_user_agent"';
+
+    server {
+        # listen on port 80
+        listen 80;
+        # save logs here
+        access_log /var/log/nginx/access.log compression;
+
+        # where the root here
+        root /var/www;
+        # what file to server as index
+        index index.html index.htm;
+        error_page 404 index.html;
+
+        # Fonts and media: images, icons, video, audio, HTC
+        location ~* \.(?:jpg|jpeg|gif|png|ico|cur|gz|svg|svgz|mp4|ogg|ogv|webm|htc|ttf)$ {
+          expires 1M;
+          access_log off;
+          add_header Cache-Control "public";
+        }
+
+        # Javascript and CSS files
+        location ~* \.(?:css|webmanifest|js|woff2|manifest)$ {
+            expires 1y;
+            access_log off;
+            add_header Cache-Control "public";
+        }
+
+        location / {
+            # First attempt to serve request as file, then
+            # as directory, then fall back to redirecting to index.html
+            try_files $uri $uri/ /index.html;
+        }
+
+    }
+}