documentation update after user feedback

updated doc following user feedback

README.md

@@ -45,39 +45,74 @@ driftctl is available on Linux, macOS and Windows.
 Binaries are available in the [release page](https://github.com/cloudskiff/driftctl/releases).
 
 #### Docker
+
 ```bash
 docker run \
   -v ~/.aws:/app/.aws:ro \
   -v $(pwd)/terraform.tfstate:/app/terraform.tfstate:ro \
   -v ~/.driftctl:/app/.driftctl \
+  -e AWS_REGION=us-east-1 \
   -e AWS_PROFILE=cloudskiff \
   cloudskiff/driftctl:v0.1.1 scan ## with the same option as the binary version
 ```
+
 `-v ~/.aws:/app/.aws:ro` mount your .aws containing credentials and profile
 
 `-v $(pwd)/terraform.tfstate:/app/terraform.tfstate:ro` mount your terraform state
 
 `-v ~/.driftctl:/app/.driftctl` to prevent driftctl downloading the provider at each run, mount a directory to persist it
 
-`-e AWS_PROFILE=cloudskiff` export the profile to use in you aws config
+`-e AWS_PROFILE=cloudskiff` export the profile to use in your AWS config
 
+`-e AWS_REGION=us-east-1` export the specific AWS region you want to use
+
+`cloudskiff/driftctl:<VERSION_TAG>` run a specific driftctl tagged release
 
 #### Manual
 
 ##### Linux
 
+This is an example using `curl`. If you don't have `curl`, install it, or use `wget`.
+
 ```bash
 # x64
-curl https://github.com/cloudskiff/driftctl/releases/latest/download/driftctl_linux_amd64 | sudo tee /usr/local/bin/driftctl
+curl -L https://github.com/cloudskiff/driftctl/releases/latest/download/driftctl_linux_amd64 -o driftctl
+
 # x86
-curl https://github.com/cloudskiff/driftctl/releases/latest/download/driftctl_linux_386 | sudo tee /usr/local/bin/driftctl
+curl -L https://github.com/cloudskiff/driftctl/releases/latest/download/driftctl_linux_386 -o driftctl
+```
+
+Make the binary executable:
+
+```bash
+chmod +x driftctl
+```
+
+Optionally install driftctl to a central location in your `PATH`:
+
+```bash
+# use any path that suits you, this is just a standard example. Install sudo if needed. 
+sudo mv driftctl /usr/local/bin/
 ```
 
 ##### macOS
 
 ```bash
 # x64
-curl https://github.com/cloudskiff/driftctl/releases/latest/download/driftctl_darwin_amd64 | sudo tee /usr/local/bin/driftctl
+curl -L https://github.com/cloudskiff/driftctl/releases/latest/download/driftctl_darwin_amd64 -o driftctl
+```
+
+Make the binary executable:
+
+```bash
+chmod +x driftctl
+```
+
+Optionally install driftctl to a central location in your `PATH`:
+
+```bash
+# use any path that suits you, this is just a standard example. Install sudo if needed. 
+sudo mv driftctl /usr/local/bin/
 ```
 
 ##### Windows