Use esbuild for jsrunner

packages/server/package.json

@@ -181,6 +181,16 @@
             "target": "build"
           }
         ]
+      },
+      "test": {
+        "dependsOn": [
+          {
+            "projects": [
+              "@budibase/string-templates"
+            ],
+            "target": "build:esbuild"
+          }
+        ]
       }
     }
   }

packages/server/src/jsRunner.ts

@@ -3,10 +3,10 @@ import env from "./environment"
 import { setJSRunner } from "@budibase/string-templates"
 import { context } from "@budibase/backend-core"
 import tracer from "dd-trace"
-import { readFileSync } from "fs"
+import fs from "fs"
 
-const helpersSource = readFileSync(
-  "node_modules/@budibase/string-templates/dist/bundle.mjs",
+const helpersSource = fs.readFileSync(
+  `${require.resolve("@budibase/string-templates/index-helpers")}`,
   "utf8"
 )
 

packages/string-templates/package.json

@@ -11,7 +11,8 @@
       "require": "./src/index.cjs",
       "import": "./dist/bundle.mjs"
     },
-    "./package.json": "./package.json"
+    "./package.json": "./package.json",
+    "./index-helpers": "./dist/index-helpers.bundled.js"
   },
   "files": [
     "dist",