chore: add build docker script

build.sh

@@ -11,7 +11,7 @@ set -eu
   # - Compiler settings see https://emscripten.org/docs/tools_reference/settings_reference.html
   # - Clang CLI flags see https://clang.llvm.org/docs/ClangCommandLineReference.html#webassembly
   emcc -std=c89 -Wall -Wextra -Werror -Wno-type-limits \
-    -O3 -flto -msimd128 -msse4.2 -mavx \
+    -O3 -flto -msimd128 -mavx \
     --no-entry \
     -sSTRICT \
     -sWASM_BIGINT \

build_docker.sh

@@ -0,0 +1,10 @@
+#!/usr/bin/env sh
+set -eu
+
+VERSION=3.1.71@sha256:9922c93314b63a1d9ceba2e76f03737f1f9cc4b7350341211e2d3555633ffdd5
+
+docker run -it --rm \
+  --workdir /workdir \
+  -v .:/workdir \
+  emscripten/emsdk:${VERSION} \
+  ./build.sh

renovate.json

@@ -10,6 +10,15 @@
     "enabled": true
   },
   "postUpdateOptions": ["pnpmDedupe"],
+  "customManagers": [
+    {
+      "customType": "regex",
+      "fileMatch": ["^build_docker\\.sh$"],
+      "matchStrings": ["VERSION=(?<currentValue>[^@\\s]+)(@(?<currentDigest>[^\\s]+))?"],
+      "packageNameTemplate": "emscripten/emsdk",
+      "datasourceTemplate": "docker"
+    }
+  ],
   "packageRules": [
     { "matchDepNames": ["node", "@types/node"], "ignoreUnstable": false },
     {