docs: improve README

README.md

@@ -1 +1,32 @@
-# tesla-firmware-decrypt
+# tesla-firmware-decrypt
+
+A tool to decrypt the Telsa OTA updates, given a key.
+
+### Requirements
+
+- Go (1.19+)
+
+### Installing
+
+#### From Source
+
+```
+git clone https://github.com/denysvitali/tesla-firmware-decrypt
+cd tesla-firmware-decrypt
+make build install
+```
+
+#### From Go
+
+```
+go install github.com/denysvitali/tesla-firmware-decrypt/cmd/tesla-firmware-decrypt@latest
+```
+
+
+### Usage
+
+```
+tesla-firmware-decrypt \
+    -k "uPaonw9KIv1tptQ3hsJsrR2Ibz3YhOcBRBaRitSi4Qg=" \
+    your-firmware-file.bin > /tmp/1.squashfs
+```