[Documentation] Add Information on cargo install --git

[kevinmatthes]

This PR fixes #89 by adding a new paragraph to INSTALL.md.

[github-actions]

Test Results

  3 files  ±0    3 suites  ±0   4s ⏱️ -1s
  9 tests ±0    9 ✔️ ±0  0 💤 ±0  0 ❌ ±0 
27 runs  ±0  27 ✔️ ±0  0 💤 ±0  0 ❌ ±0 

Results for commit f222e6b. ± Comparison against base commit cf2234b.

♻️ This comment has been updated with latest results.

[ttytm]

I'd say we can remove the current cargo install --git command from the section above and change the Build from source section as follows.

---

Build from source

Another way is to compile the app yourself. Assuming the rust toolchain is installed:

• Use cargo install on the git source

  cargo install --git  https://github.com/tobealive/wthrr-the-weathercrab.git
  

• Clone the repo and build the release version

  git clone https://github.com/tobealive/wthrr-the-weathercrab.git
  cd wthrr-the-weathercrab
  cargo build --release
  

  When the build has finished, you'll find the wthrr binary inside the ./target/release directory.

---

This puts cargo install --git as first command to build from source and also splits it from cargo build as it is not performing exactly the same in terms of having a ./target/release output.

[kevinmatthes]

Okay, I will change this tomorrow. But please note that the .git extension on GitHub repository URLs is not mandatory, thus, I would leave the URL as it is, right now.