👷 minimize image size instead of using executable

Author: Cnily03

.dockerignore

@@ -8,6 +8,8 @@ Dockerfile
 .vscode
 .editorconfig
 
+node_modules/
+
 README.md
 
 /flag.txt

.github/workflows/docker.yml

@@ -47,4 +47,4 @@ jobs:
       with:
         name: build_exports.docker.${{ steps.export.outputs.BUILD_ID }}.${{ steps.export.outputs.BUILD_HASH }}
         path: output/
-        retention-days: 1
+        retention-days: 1

.github/workflows/test.yml

@@ -23,6 +23,21 @@ jobs:
       run: |
         timeout 5s bun run start || if [ $? -eq 124 ]; then exit 0; else exit 1; fi
 
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v4
+
+    - uses: oven-sh/setup-bun@v2
+
+    - name: Install dependencies
+      run: bun install
+
+    - name: Build
+      run: bun run build
+
   compile:
     name: Compile
     runs-on: ubuntu-latest
@@ -35,5 +50,5 @@ jobs:
     - name: Install dependencies
       run: bun install
 
-    - name: Test Compile
-      run: bun run build
+    - name: Compile
+      run: bun run compile

Dockerfile

@@ -11,11 +11,15 @@ FROM oven/bun:1-alpine
 ENV FLAG=flag{test_flag}
 ENV NODE_ENV=production
 
-RUN rm -rf /usr/local/bin/bun
+RUN adduser -D -h /home/ctf -s /bin/sh ctf
+WORKDIR /home/ctf
 
-WORKDIR /app
-COPY --from=builder /app/dist/server /app/server
+COPY --from=builder /app/example.txt /home/ctf/example.txt
+COPY --from=builder /app/dist/index.js /usr/local/bin/ctf-server
+RUN chmod +x /usr/local/bin/ctf-server
+
+USER ctf
 
-CMD ["./server"]
+CMD ["/usr/local/bin/ctf-server"]
 
 EXPOSE 3000

example.txt

@@ -0,0 +1,7 @@
+Hello World!
+
+As you can see, something are replaced.
+
+==> {nothing}
+
+This is only an example.

package.json

@@ -6,8 +6,10 @@
   "scripts": {
     "start": "bun run ./src/index.ts",
     "dev": "bun --watch run ./src/index.ts",
-    "build": "bun build ./src/index.ts --compile --minify --outfile dist/server",
-    "build:dev": "bun build ./src/index.ts --compile --sourcemap --outfile dist/server"
+    "compile": "bun build ./src/index.ts --compile --minify --outfile dist/server",
+    "compile:dev": "bun build ./src/index.ts --compile --sourcemap --outfile dist/server",
+    "build": "bun build ./src/index.ts --target bun --minify --outdir dist/",
+    "build:dev": "bun build ./src/index.ts --target bun --sourcemap --outdir dist/"
   },
   "keywords": [],
   "author": "",

src/index.html

@@ -18,8 +18,8 @@
         .box {
             display: block;
             box-sizing: border-box;
-            width: 500px;
-            max-width: 95vw;
+            width: 648px;
+            max-width: 97vw;
             margin: 0 auto;
             padding: 20px;
         }
@@ -97,6 +97,14 @@
         ::selection {
             background-color: rgba(61, 170, 194, .25);
         }
+
+        .w-100 {
+            width: 100%;
+        }
+
+        .w-75 {
+            width: 75%;
+        }
     </style>
 </head>
 
@@ -107,10 +115,10 @@
             <span>sed</span>
             <span class="space"></span>
             <span>'s/{.*}/</span>
-            <input type="text" name="pattern" placeholder="Enter text to replace">
+            <input class="w-100" type="text" name="pattern" placeholder="replacement" value="truncated">
             <span>/g'</span>
             <span class="space"></span>
-            <input type="text" name="file" placeholder="Enter file path">
+            <input class="w-75" type="text" name="file" placeholder="file path" value="./example.txt">
         </div>
         <div class="output" id="output">Press enter to execute.</div>
     </div>
@@ -127,7 +135,7 @@
                 const arrayBuffer = new Uint8Array(buf).buffer;
                 return new TextDecoder().decode(arrayBuffer);
             }
-            const tail = (s, c) => `${s}\nProcess exited with code ${c}.`;
+            const tail = (s, t) => `${s}${s.endsWith('\n') ? '' : '\n'}\n${t}`;
             i.forEach(el => el.addEventListener('keydown', function (e) {
                 if (e.keyCode !== 13) return;
                 if (mutex) return;
@@ -147,9 +155,9 @@
                         if (json.exit === 0) {
                             setOutput(await debuffer(json.stdout), json.exit);
                         } else {
-                            setOutput(tail(await debuffer(json.stderr), json.exit));
+                            setOutput(tail(await debuffer(json.stderr), `Process exited with code ${json.exit}.`));
                         }
-                    } else throw new Error(await res.text());
+                    } else throw new Error(tail(await res.text(), `Server responded with status ${res.status}.`));
                 }).catch(err => {
                     setOutput(err.message);
                 })

src/index.ts

@@ -1,4 +1,4 @@
-#!/usr/bin/env -S bun run
+#!/usr/bin/env bun
 import { $ } from 'bun';
 import { readAndMinifyHTML } from './macro' with { type: 'macro' };
 

tsconfig.json

@@ -25,5 +25,10 @@
     "noPropertyAccessFromIndexSignature": false,
 
     "forceConsistentCasingInFileNames": true,
+
+    "baseUrl": ".",
+    "paths": {
+      "@/*": ["src/*"]
+    }
   }
 }