[1/n] Tiny README improvements

Test Plan:

README.md

@@ -12,33 +12,39 @@
 
 Install protobuf
 
-```
+```sh
 brew install protobuf
+```
+
+```
 cargo build
 ```
 
 ## Tests
 
 Install the cargo-nextest test runner [link](https://nexte.st/book/installation.html)
-```
+```sh
 cargo nextest run
 ```
 
-## Run
+## Run in Development Environment
 
+1/ Run the server with the default configuration
+```sh
+# Set the admin key
+CRONBACK__API__ADMIN_API_KEYS=adminkey cargo run
 ```
-cargo run -- -c <config-file>
 
+```sh
 # Skip missed runs by
 
 CRONBACK__SCHEDULER__DANGEROUS_FAST_FORWARD=true cargo run
 
-# Set the admin key
-CRONBACK__API__ADMIN_API_KEYS=adminkey cargo run
-
-# Get API Secret Token:
-export CRONBACK_SECRET_TOKEN=`http -j --auth adminkey --auth-type bearer https://localhost:8888/v1/admin/api_keys X-On-Behalf-Of:prj_063001GZKTEF61EJ34W1G0PXJS7V6M key_name=master | jq -r '.key'`
+```
 
+2/ Get API Secret Token:
+```sh
+cargo cli --localhost --secret-token=adminkey admin --project-id=prj_063001GZKTEF61EJ34W1G0PXJS7V6M api-keys create dev_key
 ```
 
 ## Prometheus Metrics