Add Docker Compose setup for local runs

Package the static site with nginx

Dockerfile

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+FROM nginx:alpine
+
+COPY nginx.conf /etc/nginx/conf.d/default.conf
+COPY index.html 404.html /usr/share/nginx/html/
+COPY alphabets.js compress.js main.js qrcode.js standalone.js /usr/share/nginx/html/

compose.yml

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+services:
+  web:
+    build: .
+    ports:
+      - "8080:80"

nginx.conf

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+server {
+  listen 80;
+  server_name localhost;
+  root /usr/share/nginx/html;
+  index index.html;
+
+  location / {
+    try_files $uri $uri/ /404.html;
+  }
+}