Update README instructions

Author: calebbourg

README.md

@@ -5,21 +5,84 @@
 You must have Rust installed to build `ambi_mock_client`.
 You can find documentation on installing Rust [here](https://www.rust-lang.org/tools/install).
 
+You will also need a local copy of [Ambi](https://github.com/jhodapp/ambi) running ( default port 4000 ).
+
 ### Using cargo run
-```Rust
+```BASH
 > cargo build
 > cargo run
-{"tempurature":"23.7","humidity":"63.8","pressure":"945","dust_concentration":"999","air_purity":"DANGEROUS"}
+
+Sending POST request to http://localhost:4000/api/readings/add as JSON: {"tempurature":"19.2","humidity":"87.7","pressure":"1074","dust_concentration":"415","air_purity":"DANGEROUS"}
+Response: Ok(
+    Response {
+        url: Url {
+            scheme: "http",
+            cannot_be_a_base: false,
+            username: "",
+            password: None,
+            host: Some(
+                Domain(
+                    "localhost",
+                ),
+            ),
+            port: Some(
+                4000,
+            ),
+            path: "/api/readings/add",
+            query: None,
+            fragment: None,
+        },
+        status: 200,
+        headers: {
+            "cache-control": "max-age=0, private, must-revalidate",
+            "content-length": "60",
+            "content-type": "application/json; charset=utf-8",
+            "date": "Sat, 22 Jan 2022 19:25:14 GMT",
+            "server": "Cowboy",
+            "x-request-id": "FsyuNssWKjhYHbUAAAAj",
+        },
+    },
+)
 
 # Or just
 
 > cargo run
-{"tempurature":"33.5","humidity":"39.6","pressure":"1100","dust_concentration":"8","air_purity":"FRESH_AIR"}
 ```
 
 ### As an executable binary
-```Rust
+```BASH
 > cargo build
 > ./target/debug/ambi_mock_client
-{"tempurature":"25.9","humidity":"43.4","pressure":"1076","dust_concentration":"322","air_purity":"DANGEROUS"}
+
+Sending POST request to http://localhost:4000/api/readings/add as JSON: {"tempurature":"28.8","humidity":"85.2","pressure":"964","dust_concentration":"930","air_purity":"DANGEROUS"}
+Response: Ok(
+    Response {
+        url: Url {
+            scheme: "http",
+            cannot_be_a_base: false,
+            username: "",
+            password: None,
+            host: Some(
+                Domain(
+                    "localhost",
+                ),
+            ),
+            port: Some(
+                4000,
+            ),
+            path: "/api/readings/add",
+            query: None,
+            fragment: None,
+        },
+        status: 200,
+        headers: {
+            "cache-control": "max-age=0, private, must-revalidate",
+            "content-length": "60",
+            "content-type": "application/json; charset=utf-8",
+            "date": "Sat, 22 Jan 2022 19:28:08 GMT",
+            "server": "Cowboy",
+            "x-request-id": "FsyuX1U1NOj9m7IAAABB",
+        },
+    },
+)
 ```