Doctor Database, Reloading and Command Checks

[nzoschke]

• Renames Doctor "resource" checks to sync with guide
• Fixes Doctor docs links
• Adds Database, Reloading and Command checks

### Setup
[✓] Convox CLI version    
[✓] Docker running    
[✓] Docker up to date    
[✓] Docker pull hello-world works    


### Build: Image
[✓] Dockerfiles found    
[!] .git in .dockerignore    
It looks like you don't have a .dockerignore file
https://docs.docker.com/engine/reference/builder/#/dockerignore-file
[✓] Large files in .dockerignore    
[✓] Image builds successfully    


### Build: Service
[✓] docker-compose.yml found    
[✓] docker-compose.yml valid    
[✓] docker-compose.yml version 2    
[✓] Dockerfiles found    
[✓] Service web is valid    
[✓] Service worker is valid    


### Build: Environment
[!] .env found    
A .env file is recommended to manage development configuration
https://convox.com/guide/environment/


### Run: Balancer
[✓] App exposes ports    


### Run: Database
[!] App defines Database    
This app does not define any Databases
http://convox.com/guide/databases/


### Run: Link
[!] App defines Links    
This app does not define any Links
http://convox.com/guide/links/
[✓] Service web environment expects     
[✓] Service worker environment expects     


### Development: Reloading
[✓] Service worker reloading: ./, package.json    
[✓] Service web reloading: ./, package.json    


### Development: Commands
[✓] Service web runs `sh`    
[✓] Service worker runs `sh`    


Success: Your app looks ready for development. 
Run it with `convox start`.

[codecov-io]

Current coverage is 29.29% (diff: 3.06%)

Merging #1334 into master will increase coverage by 0.21%

@@             master      #1334   diff @@
==========================================
  Files           136        136          
  Lines         12718      12904   +186   
  Methods           0          0          
  Messages          0          0          
  Branches          0          0          
==========================================
+ Hits           3698       3780    +82   
- Misses         8629       8723    +94   
- Partials        391        401    +10   

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[nzoschke]

Doctor: Reloading check