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Apply Adai's suggestions.

Co-authored-by: adai <[email protected]>

README.md

@@ -227,8 +227,9 @@ python examples/run_smarts.py --algo SAC --scenario ./scenarios/loop --n_agents
 If you're comfortable using docker or are on a platform without suitable support to easily run SMARTS (e.g. an older version of Ubuntu) you can run the following,
 
 ```bash
-docker run --rm -it -v $(PWD):/src -p 8081:8081 huaweinoah/smarts:<version>
-# E.g. docker run --rm -it -v $(PWD):/src -p 8081:8081 huaweinoah/smarts:v0.4.12
+$ cd /path/to/SMARTS
+$ docker run --rm -it -v $PWD:/src -p 8081:8081 huaweinoah/smarts:<version>
+# E.g. docker run --rm -it -v $PWD:/src -p 8081:8081 huaweinoah/smarts:v0.4.12
 # <press enter>
 
 # Run Envision server in the background
@@ -243,7 +244,7 @@ $ scl scenario build scenarios/loop --clean
 # add --headless if you do not need visualisation
 $ python examples/single_agent.py scenarios/loop
 
-# On your most machine visit http://localhost:8081 to see the running simulation in
+# On your host machine visit http://localhost:8081 to see the running simulation in
 # Envision.
 ```