Issue building docker container on M1

[camfairchild]

I keep coming across an error building the dockerfile on an M1 Pro.
This was due to not being able to install chromium for arm64.

 => ERROR [polkascan/explorer-ui builder  4/24] RUN npm i                                                          108.3s
------
 > [polkascan/explorer-ui builder  4/24] RUN npm i:
#0 79.88 npm WARN deprecated @npmcli/move-file@2.0.1: This functionality has been moved to @npmcli/fs
#0 107.6 npm notice 
#0 107.6 npm notice New minor version of npm available! 9.5.0 -> 9.6.0
#0 107.6 npm notice Changelog: <https://github.com/npm/cli/releases/tag/v9.6.0>
#0 107.6 npm notice Run `npm install -g npm@9.6.0` to update!
#0 107.6 npm notice 
#0 107.6 npm ERR! code 1
#0 107.6 npm ERR! path /app/polkadapt/node_modules/puppeteer
#0 107.6 npm ERR! command failed
#0 107.6 npm ERR! command sh -c node install.js
#0 107.6 npm ERR! The chromium binary is not available for arm64.
#0 107.6 npm ERR! If you are on Ubuntu, you can install with: 
#0 107.6 npm ERR! 
#0 107.6 npm ERR!  sudo apt install chromium
#0 107.6 npm ERR! 
#0 107.6 npm ERR! 
#0 107.6 npm ERR!  sudo apt install chromium-browser
#0 107.6 npm ERR! 
#0 107.6 npm ERR! ERROR: Failed to set up Chromium r1095492! Set "PUPPETEER_SKIP_DOWNLOAD" env variable to skip download.
#0 107.6 npm ERR! Error
#0 107.6 npm ERR!     at handleArm64 (/app/polkadapt/node_modules/puppeteer-core/lib/cjs/puppeteer/node/BrowserFetcher.js:137:11)
#0 107.6 npm ERR!     at BrowserFetcher.download (/app/polkadapt/node_modules/puppeteer-core/lib/cjs/puppeteer/node/BrowserFetcher.js:284:13)
#0 107.6 npm ERR!     at async downloadBrowser (/app/polkadapt/node_modules/puppeteer/lib/cjs/puppeteer/node/install.js:61:5)
#0 107.6 
#0 107.6 npm ERR! A complete log of this run can be found in:
#0 107.6 npm ERR!     /root/.npm/_logs/2023-03-03T00_30_48_200Z-debug-0.log

See: https://stackoverflow.com/a/72291691/7101091
I was able to fix it using

diff --git a/explorer-ui/Dockerfile b/explorer-ui/Dockerfile
index 4a5c777..29afd6b 100644
--- a/explorer-ui/Dockerfile
+++ b/explorer-ui/Dockerfile
@@ -2,6 +2,12 @@
 
 FROM node:lts as builder
 
+RUN apt update
+RUN apt install -y chromium
+
+# skips puppeteer installing chrome and points to correct binary
+ENV PUPPETEER_SKIP_CHROMIUM_DOWNLOAD=true
+
 # The application depends on PolkADAPT, so we have to install and build PolkADAPT first.
 
 WORKDIR /app/polkadapt

[wouterter]

Hey thanks for your report and your fix suggestion. We will implement this as well.