如何解决无法将 MERN 应用程序部署到 Heroku：构建失败
我创建了一个简单的 MERN 堆栈应用程序并尝试在 heroku 上部署该应用程序，但是，构建失败并出现以下错误：
=== Pushing procfile web (Dockerfile)
Error parsing reference: "registry.heroku.com/mydocker-libmern/procfile web" is not a valid repository/tag: invalid reference format: repository name must be lowercase
=!= Build Failed due to an error:
=!= push step: exit status 1
我只是在学习 MERN stack 和 heroku，所以我无法找出我的错误。这是我的 heroku 构建日志：
=== Fetching app code
=== Building procfile web (Dockerfile)
Sending build context to Docker daemon 1.066MBStep 1/8 : FROM node:8
8: Pulling from library/node
146bd6a88618: Pulling fs layer
9935d0c62ace: Pulling fs layer
db0efb86e806: Pulling fs layer
e705a4c4fd31: Pulling fs layer
c877b722db6f: Pulling fs layer
645c20ec8214: Pulling fs layer
db8fbd9db2fe: Pulling fs layer
1c151cd1b3ea: Pulling fs layer
fbd993995f40: Pulling fs layer
e705a4c4fd31: Waiting
c877b722db6f: Waiting
645c20ec8214: Waiting
db8fbd9db2fe: Waiting
1c151cd1b3ea: Waiting
fbd993995f40: Waiting
db0efb86e806: Verifying Checksum
db0efb86e806: Download complete
9935d0c62ace: Verifying Checksum
9935d0c62ace: Download complete
146bd6a88618: Verifying Checksum
146bd6a88618: Download complete
e705a4c4fd31: Verifying Checksum
e705a4c4fd31: Download complete
645c20ec8214: Verifying Checksum
645c20ec8214: Download complete
db8fbd9db2fe: Verifying Checksum
db8fbd9db2fe: Download complete
1c151cd1b3ea: Verifying Checksum
1c151cd1b3ea: Download complete
fbd993995f40: Verifying Checksum
fbd993995f40: Download complete
c877b722db6f: Verifying Checksum
c877b722db6f: Download complete
146bd6a88618: Pull complete
9935d0c62ace: Pull complete
db0efb86e806: Pull complete
e705a4c4fd31: Pull complete
c877b722db6f: Pull complete
645c20ec8214: Pull complete
db8fbd9db2fe: Pull complete
1c151cd1b3ea: Pull complete
fbd993995f40: Pull complete
Digest: sha256:a681bf74805b80d03eb21a6c0ef168a976108a287a74167ab593fc953aac34df
Status: Downloaded newer image for node:8
---> 8eeadf3757f4
Step 2/8 : workdir /app
---> Running in 6f59d3ab046e
Removing intermediate container 6f59d3ab046e
---> e6d2820f875b
Step 3/8 : copY package*.json ./
---> d01a3c849dce
Step 4/8 : RUN npm install
---> Running in 1dd479505c5c
npm WARN read-shrinkwrap This version of npm is compatible with lockfiLeversion@1,but package-lock.json was generated for lockfiLeversion@2. I'll try to do my best with it!
> core-js@2.6.12 postinstall /app/node_modules/core-js
> node -e "try{require('./postinstall')}catch(e){}"
Thank you for using core-js ( https://github.com/zloirock/core-js ) for polyfilling JavaScript standard library!
The project needs your help! Please consider supporting of core-js on Open Collective or Patreon:
> https://opencollective.com/core-js
> https://www.patreon.com/zloirock
Also,the author of core-js ( https://github.com/zloirock ) is looking for a good job -)
> uglifyjs-webpack-plugin@0.4.6 postinstall /app/node_modules/uglifyjs-webpack-plugin
> node lib/post_install.js
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.1.2 (node_modules/fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.1.2: wanted {"os":"darwin","arch":"any"} (current: {"os":"linux","arch":"x64"})
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.2.13 (node_modules/watchpack-chokidar2/node_modules/fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.2.13: wanted {"os":"darwin","arch":"x64"})
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@2.3.2 (node_modules/chokidar/node_modules/fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@2.3.2: wanted {"os":"darwin","arch":"x64"})
added 1396 packages from 871 contributors and audited 1442 packages in 27.455s
46 packages are looking for funding
run `npm fund` for details
found 92 vulnerabilities (34 low,49 moderate,9 high)
run `npm audit fix` to fix them,or `npm audit` for details
Removing intermediate container 1dd479505c5c
---> ba95593912de
Step 5/8 : copY . .
---> 92c0f6644d22
Step 6/8 : RUN npm run build
---> Running in bdb8ab31ef1b
> mern-crud@0.1.0 build /app
> react-scripts build
Creating an optimized production build...
Compiled with warnings.
./src/App.js
Line 2: 'ReactDOM' is defined but never used no-unused-vars
./src/registerServiceWorker.js
Line 45: Unnecessary escape character: \/ no-useless-escape
Line 45: Unnecessary escape character: \/ no-useless-escape
./src/components/Create.js
Line 2: 'ReactDOM' is defined but never used no-unused-vars
./src/components/Home.js
Line 2: 'axios' is defined but never used no-unused-vars
Line 3: 'Link' is defined but never used no-unused-vars
./src/components/Navbar.js
Line 2: 'axios' is defined but never used no-unused-vars
Line 3: 'Link' is defined but never used no-unused-vars
./src/components/Footer.js
Line 2: 'axios' is defined but never used no-unused-vars
Line 3: 'Link' is defined but never used no-unused-vars
Search for the keywords to learn more about each warning.
To ignore,add // eslint-disable-next-line to the line before.
File sizes after gzip:
61.88 KB build/static/js/main.4d143893.js
32.28 KB build/static/css/main.8308ed42.css
The project was built assuming it is hosted at the server root.
To override this,specify the homepage in your package.json.
For example,add this to build it for GitHub Pages:
"homepage" : "http://myname.github.io/myapp",The build folder is ready to be deployed.
You may serve it with a static server:
npm install -g serve
serve -s build
Removing intermediate container bdb8ab31ef1b
---> c5891dfadf15
Step 7/8 : EXPOSE 3000
---> Running in c5735fbc9972
Removing intermediate container c5735fbc9972
---> f40475140a26
Step 8/8 : CMD [ "npm","start" ]
---> Running in 8f6660ab0250
Removing intermediate container 8f6660ab0250
---> f182f7d5b6a3
Successfully built f182f7d5b6a3
Successfully tagged 34e979fa4038fc1b151eb3428263d5ef353362b6:latest
=== Pushing procfile web (Dockerfile)
Error parsing reference: "registry.heroku.com/mydocker-libmern/procfile web" is not a valid repository/tag: invalid reference format: repository name must be lowercase
=!= Build Failed due to an error:
=!= push step: exit status 1
If this persists,please contact us at https://help.heroku.com/.
这是我的源代码：https://github.com/SreyaSalil/mern-lib-crud
由于我仍在学习 MERN 和 heroku，如果您能详细解释我做错了什么以及如何更正，那就太好了。
解决方法
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