Add OCI Linux workspace template

registry/coder/templates/oci-linux/README.md

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+---
+display_name: Oracle Cloud Infrastructure (Linux)
+description: Provision OCI compute instances as Coder workspaces
+icon: ../../../../.icons/cloud-devops.svg
+verified: false
+tags: [vm, linux, oci]
+---
+
+# Remote Development on Oracle Cloud Infrastructure (Linux)
+
+Provision OCI compute instances as Coder workspaces.
+
+## Prerequisites
+
+### Authentication
+
+This template assumes you have configured the OCI Terraform provider with API key
+credentials. The provider supports configuration through environment variables,
+`~/.oci/config`, or Terraform variables. See the OCI provider docs for details:
+
+- https://registry.terraform.io/providers/oracle/oci/latest/docs
+
+You will need:
+
+- Tenancy OCID
+- User OCID
+- Fingerprint
+- Private key
+- Region
+
+### Required inputs
+
+Provide these values when using the template:
+
+- `tenancy_ocid`
+- `compartment_ocid`
+
+## Architecture
+
+This template provisions the following resources:
+
+- VCN, subnet, route table, and internet gateway
+- OCI compute instance
+- Boot volume size configured per workspace
+
+> Note: This template is designed to be a starting point. Edit the Terraform to
+> customize networking, images, or storage policies.
+
+## code-server
+
+`code-server` is installed via the `coder_agent` init script, and exposed in the
+Coder UI through the `code-server` module.

registry/coder/templates/oci-linux/cloud-init/cloud-config.yaml.tftpl

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+#cloud-config
+users:
+  - name: ${linux_user}
+    sudo: ["ALL=(ALL) NOPASSWD:ALL"]
+    groups: sudo
+    shell: /bin/bash
+packages:
+  - git
+write_files:
+  - path: /opt/coder/init
+    permissions: "0755"
+    encoding: b64
+    content: ${init_script}
+  - path: /etc/systemd/system/coder-agent.service
+    permissions: "0644"
+    content: |
+      [Unit]
+      Description=Coder Agent
+      After=network-online.target
+      Wants=network-online.target
+
+      [Service]
+      User=${linux_user}
+      ExecStart=/opt/coder/init
+      Environment=CODER_AGENT_TOKEN=${coder_agent_token}
+      Restart=always
+      RestartSec=10
+      TimeoutStopSec=90
+      KillMode=process
+
+      OOMScoreAdjust=-900
+      SyslogIdentifier=coder-agent
+
+      [Install]
+      WantedBy=multi-user.target
+runcmd:
+  - systemctl enable coder-agent
+  - systemctl start coder-agent