feat: Add posibility to specify custom versions via build-arg

I.e.
docker build -t pre-commit --build-arg PRE_COMMIT_VERSION=2.14.0  .

Dockerfile

@@ -1,12 +1,12 @@
 FROM ubuntu:20.04
 
-ARG PRE_COMMIT_VERSION="2.11.1"
-ARG TERRAFORM_VERSION="0.15.0"
-ARG TFSEC_VERSION="v0.58.6"
-ARG TERRAFORM_DOCS_VERSION="v0.12.0"
-ARG TFLINT_VERSION="v0.27.0"
-ARG CHECKOV_VERSION="1.0.838"
-ARG TERRASCAN_VERSION="1.10.0"
+ARG PRE_COMMIT_VERSION=${PRE_COMMIT_VERSION:-2.11.1}
+ARG TERRAFORM_VERSION=${TERRAFORM_VERSION:-0.15.0}
+ARG TFSEC_VERSION=${TFSEC_VERSION:-0.58.6}
+ARG TERRAFORM_DOCS_VERSION=${TERRAFORM_DOCS_VERSION:-0.12.0}
+ARG TFLINT_VERSION=${TFLINT_VERSION:-0.27.0}
+ARG CHECKOV_VERSION=${CHECKOV_VERSION:-1.0.838}
+ARG TERRASCAN_VERSION=${TERRASCAN_VERSION:-1.10.0}
 
 # Install general dependencies
 RUN apt update && \
@@ -27,9 +27,9 @@ RUN pip3 install --no-cache-dir pre-commit==${PRE_COMMIT_VERSION}
 
 # Install tools
 RUN \
-    curl -L "$(curl -s https://api.github.com/repos/terraform-docs/terraform-docs/releases | grep -o -E "https://.+?${TERRAFORM_DOCS_VERSION}-linux-amd64.tar.gz")" > terraform-docs.tgz && tar -xzf terraform-docs.tgz terraform-docs && chmod +x terraform-docs && mv terraform-docs /usr/bin/ && \
-    curl -L "$(curl -s https://api.github.com/repos/terraform-linters/tflint/releases | grep -o -E "https://.+?/${TFLINT_VERSION}/tflint_linux_amd64.zip")" > tflint.zip && unzip tflint.zip && rm tflint.zip && mv tflint /usr/bin/ && \
-    curl -L "$(curl -s https://api.github.com/repos/aquasecurity/tfsec/releases | grep -o -E "https://.+?${TFSEC_VERSION}/tfsec-linux-amd64" | head -n 1)" > tfsec && chmod +x tfsec && mv tfsec /usr/bin/ && \
+    curl -L "$(curl -s https://api.github.com/repos/terraform-docs/terraform-docs/releases | grep -o -E "https://.+?v${TERRAFORM_DOCS_VERSION}-linux-amd64.tar.gz")" > terraform-docs.tgz && tar -xzf terraform-docs.tgz terraform-docs && chmod +x terraform-docs && mv terraform-docs /usr/bin/ && \
+    curl -L "$(curl -s https://api.github.com/repos/terraform-linters/tflint/releases | grep -o -E "https://.+?/v${TFLINT_VERSION}/tflint_linux_amd64.zip")" > tflint.zip && unzip tflint.zip && rm tflint.zip && mv tflint /usr/bin/ && \
+    curl -L "$(curl -s https://api.github.com/repos/aquasecurity/tfsec/releases | grep -o -E "https://.+?v${TFSEC_VERSION}/tfsec-linux-amd64" | head -n 1)" > tfsec && chmod +x tfsec && mv tfsec /usr/bin/ && \
     curl -L "$(curl -s https://api.github.com/repos/accurics/terrascan/releases | grep -o -E "https://.+?${TERRASCAN_VERSION}_Linux_x86_64.tar.gz")" > terrascan.tar.gz && tar -xzf terrascan.tar.gz terrascan && rm terrascan.tar.gz && mv terrascan /usr/bin/ && \
     pip3 install --no-cache-dir checkov==${CHECKOV_VERSION}
 
@@ -41,13 +41,15 @@ RUN curl -fsSL https://apt.releases.hashicorp.com/gpg | apt-key add - && \
     # Cleanup
     rm -rf /var/lib/apt/lists/*
 
-# Checking all binaries are in the PATH
-RUN terraform --help       >/dev/null
-RUN pre-commit --help      >/dev/null
-RUN terraform-docs --help  >/dev/null
-RUN tflint --help          >/dev/null
-RUN tfsec --help           >/dev/null
-RUN checkov --help         >/dev/null
-RUN terrascan --help       >/dev/null
+# Checking that all binaries are in the PATH and show their versions
+RUN echo "\n\n" && \
+    pre-commit --version && \
+    terraform --version | head -n 1 && \
+    terraform-docs --version && \
+    tflint --version && \
+    echo -n "tfsec " && tfsec --version && \
+    echo -n "checkov " && checkov --version && \
+    echo -n "terrascan " && terrascan version && \
+    echo "\n\n"
 
 ENTRYPOINT [ "pre-commit" ]