shrink docker image / esbuildify (#319)

multistage docker build + esbuild

esbuild.config.js

@@ -0,0 +1,28 @@
+const esbuild = require('esbuild');
+const glob = require('tiny-glob');
+
+const commonConfig = {
+    bundle: true,
+    platform: 'node',
+    target: 'node20',
+    sourcemap: false,
+    // minify: true, makes messy debug/error output
+    treeShaking: true,
+    legalComments: 'none',
+    mainFields: ['module', 'main'],
+    metafile: true,
+    format: 'cjs',
+    external: [
+        'bigint-buffer',
+        '@triton-one/yellowstone-grpc'
+    ]
+};
+
+(async () => {
+    let entryPoints = await glob("./src/*.ts", { filesOnly: true });
+    await esbuild.build({
+        ...commonConfig,
+        entryPoints,
+        outdir: 'lib',
+    });
+})().catch(() => process.exit(1));