Html Webpack Plugin:
<pre>
Error: Child compilation failed:
Module not found: Error: Can't resolve '/app/node_modules/html-webpack-plugin/lib/loader.js' in '/app'
ModuleNotFoundError: Module not found: Error: Can't resolve '/app/node_modules/html-webpack-plugin/lib/loader.js' in '/app'
    at /app/node_modules/webpack/lib/Compilation.js:2143:28
    at /app/node_modules/webpack/lib/NormalModuleFactory.js:1076:13
    at eval (eval at create (/app/node_modules/tapable/lib/HookCodeFactory.js:31:10), <anonymous>:10:1)
    at /app/node_modules/webpack/lib/NormalModuleFactory.js:456:22
    at eval (eval at create (/app/node_modules/tapable/lib/HookCodeFactory.js:31:10), <anonymous>:9:1)
    at /app/node_modules/webpack/lib/NormalModuleFactory.js:642:22
    at /app/node_modules/webpack/lib/NormalModuleFactory.js:197:10
    at /app/node_modules/webpack/lib/NormalModuleFactory.js:878:23
    at /app/node_modules/webpack/lib/NormalModuleFactory.js:1390:5
    at /app/node_modules/neo-async/async.js:2830:7</pre>