Update build and install instructions

README.md

@@ -6,11 +6,16 @@ Build the project once with `mvn install`, this will generate the `target/jboss-
 * de.mkammerer.argon2-jvm
 * net.java.dev.jna
 
-In your Keycloak installation, go to `modules/system/layers/custom` and modify the layers.conf:
+In your Keycloak installation, go to `./modules/` and modify the `layers.conf`:
 ```
 layers=keycloak,custom
 ```
 
+And create the directory in `./modules/`:
+```
+mkdir -p ./modules/system/layers/custom
+```
+
 Now simply copy the 2 jboss modules folders into the `custom` directory in Keycloak modules.
 
 # Module deployment
@@ -24,11 +29,11 @@ Further tuning can be done by the other Policy Providers:
 * `Argon2 Variant` --> you can choose which Argon2 variant to use, either: ARGON2i, ARGON2d or ARGON2id
 * `Argon2 Iterations` --> tune the number of iterations the provider will perform
 * `Argon2 Memory Usage` --> tune the memory limitation of the provider
-* `Argon2 Paralellism` --> tune the number of threads and memory lanes
+* `Argon2 Parallelism` --> tune the number of threads and memory lanes
 * `Argon2 Salt Length` --> tune the length of the salt
 * `Argon2 Hash Length` --> tune the length of the hash
 
-For security purposes, there's also the possibility to configure the maximum runtime of the hashing, by default it's 1000 milliseconds, however it can be configured via the `Argon2 Max Time` policy.
+For security purposes, there's also the possibility to configure the desired maximum runtime of the hashing, by default it's 1000 milliseconds, however it can be configured via the `Argon2 Max Time` policy.
 In case the hashing exceeds this time, it will generate a `WARN` in the console.
 
-For parameter optimization, check the [project's benchmark](https://github.com/phxql/argon2-jvm#recommended-parameters) or the [Argon2 whitepaper recommendations](https://github.com/P-H-C/phc-winner-argon2/blob/master/argon2-specs.pdf#section.9).
+For parameter optimization, check the [project's benchmark](https://github.com/phxql/argon2-jvm#recommended-parameters) or the [Argon2 whitepaper recommendations](https://github.com/P-H-C/phc-winner-argon2/blob/master/argon2-specs.pdf#section.9).