chore: tidy up vagrant file

Vagrantfile

@@ -12,38 +12,45 @@ Vagrant.configure("2") do |config|
   config.vm.provision "shell", inline: <<-SHELL
     set -e -x -o pipefail
 
-    apt-get update && apt-get install -y ca-certificates wget make vim
+    apt-get update && apt-get install -y ca-certificates wget make vim libseccomp-dev
 
     # Install docker
-    wget \
-      https://download.docker.com/linux/ubuntu/dists/jammy/pool/stable/amd64/containerd.io_1.7.24-1_amd64.deb \
-      https://download.docker.com/linux/ubuntu/dists/jammy/pool/stable/amd64/docker-ce-cli_27.3.1-1~ubuntu.22.04~jammy_amd64.deb \
-      https://download.docker.com/linux/ubuntu/dists/jammy/pool/stable/amd64/docker-ce_27.3.1-1~ubuntu.22.04~jammy_amd64.deb \
-      https://download.docker.com/linux/ubuntu/dists/jammy/pool/stable/amd64/docker-buildx-plugin_0.17.1-1~ubuntu.22.04~jammy_amd64.deb \
-      https://download.docker.com/linux/ubuntu/dists/jammy/pool/stable/amd64/docker-compose-plugin_2.29.7-1~ubuntu.22.04~jammy_amd64.deb
-
-    dpkg -i \
-      containerd.io_*_amd64.deb \
-      docker-ce-cli_*_amd64.deb \
-      docker-ce_*_amd64.deb \
-      docker-buildx-plugin_*_amd64.deb \
-      docker-compose-plugin_*_amd64.deb
-
-    # Start docker service with brownie runtime
+    if ! command -v docker 2>&1 >/dev/null; then
+      wget \
+        https://download.docker.com/linux/ubuntu/dists/jammy/pool/stable/amd64/containerd.io_1.7.24-1_amd64.deb \
+        https://download.docker.com/linux/ubuntu/dists/jammy/pool/stable/amd64/docker-ce-cli_27.3.1-1~ubuntu.22.04~jammy_amd64.deb \
+        https://download.docker.com/linux/ubuntu/dists/jammy/pool/stable/amd64/docker-ce_27.3.1-1~ubuntu.22.04~jammy_amd64.deb \
+        https://download.docker.com/linux/ubuntu/dists/jammy/pool/stable/amd64/docker-buildx-plugin_0.17.1-1~ubuntu.22.04~jammy_amd64.deb \
+        https://download.docker.com/linux/ubuntu/dists/jammy/pool/stable/amd64/docker-compose-plugin_2.29.7-1~ubuntu.22.04~jammy_amd64.deb
+
+      dpkg -i \
+        containerd.io_*_amd64.deb \
+        docker-ce-cli_*_amd64.deb \
+        docker-ce_*_amd64.deb \
+        docker-buildx-plugin_*_amd64.deb \
+        docker-compose-plugin_*_amd64.deb
+
+      # Start docker service with brownie runtime
+      # Add user to docker group
+      gpasswd -a vagrant docker
+    fi
+
     service docker stop
     dockerd --add-runtime brownie=/brownie/tmp/bin/brownie \
       > /dev/null 2>&1 & disown
 
-    # Add user to docker group
-    gpasswd -a vagrant docker
 
     # Install go
-    wget https://go.dev/dl/go1.23.4.linux-amd64.tar.gz -O go.tar.gz
-    tar -C /usr/local -xzf go.tar.gz
-    echo "PATH=$PATH:/usr/local/go/bin" >> /etc/environment
+    if ! command -v go 2>&1 >/dev/null; then
+      wget https://go.dev/dl/go1.23.4.linux-amd64.tar.gz -O go.tar.gz
+      tar -C /usr/local -xzf go.tar.gz
+      echo "PATH=$PATH:/usr/local/go/bin" >> /etc/environment
+    fi
 
     # systemd cgroup jiggery-pokery
-    mkdir /sys/fs/cgroup/systemd
-    mount -t cgroup -o none,name=systemd cgroup /sys/fs/cgroup/systemd
+    if ! grep -qs '/sys/fs/cgroup/systemd' /proc/mounts; then
+      mkdir -p /sys/fs/cgroup/systemd
+      mount -t cgroup -o none,name=systemd cgroup /sys/fs/cgroup/systemd
+    fi
   SHELL
 end