heroku try again

.travis.yml

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+language: rust
+sudo: required
+rust:
+- stable
+script:
+- |
+  cargo build &&
+  cargo test

Procfile

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+web: ./target/release/lupt -s ./static -a 0.0.0.0:$PORT
+

app.json

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+{
+    "name": "Lupt",
+    "description": "Chat app to talk in group or to strangers",
+    "repository": "https://gitlab.com/PiyushXCoder/lupt",
+    "success_url": "/",
+    "keywords": ["rust", "actix"],
+    "website": "https://gitlab.com/PiyushXCoder/lupt",
+    "env": {
+      "BUILDPACK_URL": "https://gitlab.com/PiyushXCoder/lupt.git"
+    }
+  }