Update paths to dokku and docker

app.py

@@ -6,6 +6,8 @@ from flask import Flask, jsonify, render_template
 
 app = Flask(__name__)
 
+DOKKU = "/usr/bin/dokku"
+DOCKER = "/usr/bin/docker"
 POLL_SECONDS = int(os.getenv("POLL_SECONDS", "10"))
 SHOW_CONTAINERS = os.getenv("SHOW_CONTAINERS", "0") == "1"
 
@@ -13,7 +15,7 @@ def sh(cmd: list[str]) -> str:
     return subprocess.check_output(cmd, stderr=subprocess.STDOUT, text=True).strip()
 
 def dokku_apps() -> list[str]:
-    out = sh(["dokku", "apps:list"])
+    out = sh([DOKKU, "apps:list"])
     lines = [l.strip() for l in out.splitlines()]
     # Format:
     # =====> My Apps
@@ -23,14 +25,14 @@ def dokku_apps() -> list[str]:
 
 def dokku_urls(app_name: str) -> list[str]:
     try:
-        out = sh(["dokku", "urls:report", app_name, "--urls"])
+        out = sh([DOKKU, "urls:report", app_name, "--urls"])
         return [u.strip() for u in out.split() if u.strip()]
     except Exception:
         return []
 
 def dokku_ps_report(app_name: str) -> dict:
     try:
-        out = sh(["dokku", "ps:report", app_name])
+        out = sh([DOKKU, "ps:report", app_name])
         # crude parse: "Key: value"
         data = {}
         for line in out.splitlines():
@@ -46,7 +48,7 @@ def docker_stats() -> dict:
     Returns a mapping of container_name -> {cpu, mem_used, mem_limit, mem_pct}
     """
     fmt = "{{.Name}}\t{{.CPUPerc}}\t{{.MemUsage}}\t{{.MemPerc}}"
-    out = sh(["docker", "stats", "--no-stream", "--format", fmt])
+    out = sh([DOCKER, "stats", "--no-stream", "--format", fmt])
     stats = {}
     for line in out.splitlines():
         name, cpu, mem_usage, mem_pct = line.split("\t")
@@ -62,7 +64,7 @@ def docker_stats() -> dict:
 
 def docker_ps() -> list[dict]:
     fmt = "{{.Names}}\t{{.Image}}\t{{.Status}}\t{{.Ports}}"
-    out = sh(["docker", "ps", "--format", fmt])
+    out = sh([DOCKER, "ps", "--format", fmt])
     rows = []
     for line in out.splitlines():
         name, image, status, ports = line.split("\t")